<template>
  <div>
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>商品分类</el-breadcrumb-item>
    </el-breadcrumb>
    <el-card>
      <el-row>
        <el-col>
          <el-button type="primary" @click="showAddDiaolog">添加分类</el-button>
        </el-col>
      </el-row>
      <!-- 表格区域 -->
      <tree-table class="treetable" :data="cateList" index-text="#" border :columns="columns" :selection-type="false" :expand-type="false" :show-index="true">
        <!-- 是否有效 -->
        <template slot="isok" slot-scope="scope">
          <i class="el-icon-success" v-if="scope.row.cat_deleted===false" style="color:green"></i>
          <i class="el-icon-error" v-else style="color:red"></i>
        </template>
        <!-- 分级 -->
        <template slot="order" slot-scope="scope">
          <el-tag size="mini" v-if="scope.row.cat_level===0">一级</el-tag>
          <el-tag type="success" size="mini" v-if="scope.row.cat_level===1">二级</el-tag>
          <el-tag type="warning" size="mini" v-if="scope.row.cat_level===2">三级</el-tag>
        </template>
        <!-- 操作 -->
        <template slot="opt">
          <el-button type="primary" icon="el-icon-edit" size="mini">编辑</el-button>
          <el-button type="danger" icon="el-icon-delete" size="mini">删除</el-button>
        </template>
      </tree-table>
      <!-- 分页区域 -->
      <el-pagination @size-change="handleSizeChange" @current-change="handleCurrentChange" :current-page="querInfo.pagenum" :page-sizes="[3, 5, 10, 20]" :page-size="querInfo.pagesize" layout="total, sizes, prev, pager, next, jumper" :total="total">
      </el-pagination>
    </el-card>

    <!-- 添加分类对话框 -->
    <el-dialog title="添加分类" :visible.sync="addCateDialogVisble" width="50%" @close="addCateDialogclose">
      <!-- 表单具体内容 -->
      <el-form :model="addCateForm" :rules="addCateFormRules" ref="addCateFormRef" label-width="100px" class="demo-ruleForm">
        <el-form-item label="分类名称" prop="cat_name">
          <el-input v-model="addCateForm.cat_name"></el-input>
        </el-form-item>
        <el-form-item label="父级名称">
          <el-cascader class="cascader" expand-trigger="hover" clearable v-model="seletCatKeys" :options="ParentCates" :props="CatcaderProps" @change="parentCateChange">
          </el-cascader>
        </el-form-item>
      </el-form>
      <!-- 底部内容 -->
      <span slot="footer" class="dialog-footer">
        <el-button @click="addCateDialogVisble = false">取 消</el-button>
        <el-button type="primary" @click="addCate">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    return {
      querInfo: {
        type: 3,
        pagenum: 1,
        pagesize: 5
      },
      cateList: [],
      total: 0,
      //   添加分类对话框的显示
      addCateDialogVisble: false,
      // 添加表单的数据对象
      addCateForm: {
        // 添加分类的名称
        cat_name: '',
        cat_pid: 0,
        cat_level: 0
      },
      // 校验规则
      addCateFormRules: {
        cat_name: [
          { required: true, message: '请输入添加名称', trigger: 'blur' }
        ]
      },
      // 分类列表数据对象
      ParentCates: [],
      // 级联选择器的数据对象
      CatcaderProps: {
        value: 'cat_id',
        label: 'cat_name',
        children: 'children'
      },
      // 级联选择器的选择集合
      seletCatKeys: [],
      //   treeable自定义属性
      columns: [
        {
          label: '分类名称',
          prop: 'cat_name'
        },
        // 自定义插槽，将当前列作为模板列
        {
          label: '是否有效',
          type: 'template',
          template: 'isok'
        },
        {
          label: '排序',
          type: 'template',
          template: 'order'
        },
        {
          label: '操作',
          type: 'template',
          template: 'opt'
        }
      ]
    }
  },
  created() {
    this.getCateList()
  },
  methods: {
    // 获取商品分类数据
    async getCateList() {
      const { data: res } = await this.$http.get('categories', {
        params: this.querInfo
      })
      if (res.meta.status !== 200) {
        return this.$http.console.error('获取商品分类失败')
      }
      //   console.log(res.data)
      this.cateList = res.data.result
      this.total = res.data.total
    },
    // 分页跳转
    handleSizeChange(newSize) {
      this.querInfo.pagesize = newSize
      this.getCateList()
    },
    // 监听pageNum改变
    handleCurrentChange(newPage) {
      this.querInfo.pagenum = newPage
      this.getCateList()
    },
    // 触发添加分类按钮对话框
    showAddDiaolog() {
      // 获取父级数据列表
      this.getParentCates()
      this.addCateDialogVisble = true
    },
    // 获取父级分类列表数据
    async getParentCates() {
      const { data: res } = await this.$http.get('categories', {
        params: { type: 2 }
      })
      if (res.meta.status !== 200) {
        return this.$message.error('获取分类数据失败')
      }
      console.log(res.data)
      this.ParentCates = res.data
    },
    // 级联选择器触发
    parentCateChange() {
      //   console.log(this.seletCatKeys)
      //   如果selectkey数组中的length大于0，证明选中的父级分类 反之，没有选择任何
      if (this.seletCatKeys.length > 0) {
        //   父级分类的id
        this.addCateForm.cat_pid =
          this.seletCatKeys[this.seletCatKeys.length - 1]
        //   为当前分类的等级赋值
        this.addCateForm.cat_level = this.seletCatKeys.length
      } else {
        //   父级id和当前分类的等级赋值
        this.addCateForm.cat_pid = 0
        this.addCateForm.cat_level = 0
      }
    },
    addCate() {
      //   console.log(this.addCateForm)
      this.$refs.addCateFormRef.validate(async valid => {
        if (!valid) return
        const { data: res } = await this.$http.post(
          'categories',
          this.addCateForm
        )
        if (res.meta.status !== 201) {
          return this.$message.error('添加分类失败')
        }
        this.$message.success('添加分类成功')
        this.getCateList()
        this.addCateDialogVisble = false
      })
    },
    // 监听对话框关闭事件
    addCateDialogclose() {
      // resetFields()是表单自带的方法
      this.$refs.addCateFormRef.resetFields()
      this.seletCatKeys = []
      this.addCateForm.cat_level = 0
      this.addCateForm.cat_pid = 0
    }
  }
}
</script>

<style lang="less" scoped>
.treetable {
  margin-top: 15px;
}
.el-cascader {
  width: 100%;
  height: 40%;
}
</style>
